Kos was a song written by Lenny Solomon for the Emunah Album released in early 1988.

Hall of Famer Engineer Mick Cantarella used to say, Kos was the song that frankly drove him

crazy.  Probably because of the repetitiveness of the melody!  Lenny always got a kick out of that!

Anyway, the words Kos Yeshuot Esa U’ViShame Hashem Ekra come from the Havdalah Service

when Shabbat is ending and the new week begins!